Archaic Arcane... also well-said!! I've read/studied (on my own, not professionally)/attempted good nutrition my entire married life. My husband tends to gain quickly... his sweet mother (who I adored) was morbidly obese... our daughter struggles with weight... well, not now... but when she was little, she did.... poor thing. She is very disciplined now, and that is her solution. If she slides the tiniest bit, she gains.
All that to say, while I'm not a professional, I've read a LOT on this and these two ladies have spoken (what I believe to be) truths!!
It is a lifestyle choice... it is not an easy lifestyle choice....